# Oovium vs Kihya Memo

The clearest difference is update cadence: Kihya Memo at daily against Oovium's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Oovium ships an update every 6 weeks, Kihya Memo daily. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Oovium | Kihya Memo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/oovium/id336573328/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 64.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | Free | — |
| Size | 10 MB | 33 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Aepryus Software](https://appshunter.io/developer/336573331) | [Kihya](https://appshunter.io/developer/1654446048) |

## What reviewers say

### Oovium

[App page](https://appshunter.io/ios/app/oovium/id336573328)

This app is a novel calculation sandbox that combines the functionality of calculators, spreadsheets, concept maps, and programming languages into a single, visually intuitive interface. It aims to make complex computing abilities accessible to a wider audience through explicit visual representations.

**Highlights:** Calculation sandbox, Visual programming interface, Spreadsheet functionality (GridBub), Concept mapping (TextBub), Custom function definition (MechBub), Object instances (InstBub)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative concept
- 💡 Creative approach to calculations
- 💡 Visualizing problems and solutions
- 💡 Useful for prototyping and debugging
- 💡 Good for "what-if" analysis

**What reviewers complain about**

- 🐛 Poor documentation
- 🐛 Trial and error learning curve
- 🐛 Mac version unclear
- 🐛 Subscription too expensive
- 🐛 Apple-exclusive

**Reported bugs**

- Subscription not working
- Crashes on launch on iPad
- Links to Dropbox no longer work
- Update killed everything, crashes on first screen
- Crashes regularly

**Requested features**

- Better terminology
- Vastly better documentation
- Pay-once option
- Lower purchase price ($3.99 or less)
- Graphing and graphics capabilities


### Kihya Memo

[App page](https://appshunter.io/ios/app/kihya-memo-notes-and-markdown/id6800992871)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Oovium free?

Oovium is free to download, with no in-app purchases.

### Is Kihya Memo free?

Kihya Memo is free to download, with no in-app purchases.

### Do Oovium or Kihya Memo have ads?

Neither Oovium nor Kihya Memo shows ads.

### Which is updated more often, Oovium or Kihya Memo?

Oovium ships an update every 6 weeks, and Kihya Memo daily. Most recently, Oovium was updated on October 17, 2026 and Kihya Memo on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*